Tube-number record
CK7571/QK685
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ClassRecording Storage Tube
BaseDuodecal
Filament6.3 V @ 600 mA
Construction
Primary TypeTetrode
EnvelopeGlass
SectionsSingle
Filament / Heater
Heater Notes6.3V +/- 10%
Absolute Maximum Ratings
Plate Voltage5000 V
Grid 2 Voltage1000 V
Grid 1 Voltage-125 V
Audio Performance
Key Features
- High resolution electrical output
- Magnetic deflection
- Electrostatic or magnetic focus
- Integration ability
- Wide dynamic range
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Read | 3500 V | — | — | — | 0.005 mA |
| Prime | 3500 V | — | — | — | 0.025 mA |
| Erase | 3500 V | — | — | — | 0.05 mA |
Application Notes
Requires four operations: prime, write, read and erase. Capable of storing information for many hours and reading up to 20,000 times.
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